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Alter to Include Aerodynamic Coefficients


Name     propa.v2001, propf.f (a FORTRAN program)


Purpose

To provide the propeller aerodynamic coefficients and wing/nacelle
aerodynamic interference loads for aircraft flutter analysis.
This standalone dmap is only needed to generate a flow field
in the form of a punch file for the propf.for program.


Solution Sequence

SOL 145.  


Input

Call MSC and request a copy of the documentation.


Output

Standard MSC/NASTRAN output.  If downwash effects are to be
included, then a punch file is generated in the phase 1 run.


Sample Files: 

prop1.dat  Demonstrates the inclusion of the propeller effects in
an aerodynamic flutter analysis.  In this example, the
downwash effects are not included, so a single
MSC/NASTRAN analysis is performed.  The propeller
effects are included with DMIG entries generated with
the propf.for preprocessor.

prop2.dat  Generates a flow field in the form of a punch file that
is used as input to the propf.for preprocessor.  The
purpose of this run is only to generate the flow field,
not to perform a flutter analysis.  The flutter analysis
is performed in prop3.dat, which is run after the
propf.for preprocessor.

prop3.dat  This file is run after prop2.dat and the preprocessor
propf.for.  The propeller effects with the downwash
effect included are in the DMIG entries generated by
the preprocessor.


Additional Documentation

W. P. Rodden and T. L. Rose, "Propeller/Nacelle Whirl Flutter Addition
to MSC/NASTAN," Paper No. 12, Proceedings of the 1989 MSC
World User's Conference, Universal City, Ca., March 1989.
(NOTE: there is an error in this paper - the semi-chord length used
in the sample case based on NASA TN18307 is twice that specified in
the TN).

"MSC/NASTRAN Addition of Effects of Wing Flow Field on Propeller
Aerodynamic Loads," MSC Internal Document, June, 1989.